Oil-stove



G. P. VAN WYE.

OIL STOVE.

APPLICATION FILED JAN-30, 1-920.

Patented Apr. 5, 1921..

gmmwhoaz UNITED STATES PATENT OFFICE.

OIL-STOVE.

Specification of Letters Patent.

Patented Apr. 5, 1921.

Application filed January 80, 1920. Serial No. 355,097.

To all whom it may concern Be it known that I, GARRY P. VAN W n, a citizen of the United States, residing at New York, in the county and State of New York, have invented a new and useful Oil-Stove, of which the following is a specification.

This invention relates to oil stoves, and especially to that class where the fuel is fed to the generating device through a conduit, or pipe; and the object of the invention is to provide means to prevent the gasification of the oil prior to reaching the gas generator.

It may be stated that in gas stoves where oil is used for fuel, great heat is developed which travels by convection along the conduit, or pipe through which the oil enters the generator; and as the heavier oils, as kerosene and fuel oil contain considerable matter that is not readily gasified, or that is gasified at such a high temperature it will be left behind when the more easily .vaporizable part has been extracted, and

will clog up the conduit, or pipe through which the oil passes to the generator, it is desirable to provide means to keep the oil cool until the same reaches the generator.

With the oil commercially sold as kerosene it is not so important to keep the oil cool as the liability of clogging is not so great; but with the heavier oils, as fuel oil and crude petroleum it is important to keep the conduit, or pipe cool so gasification will not take place till the oil has reached. a point where the pipes can be readily cleaned, if sediment, or heavy materials is left behind.

It is the object of this invention to surround the feed pipe within the heat zone of the burning vapor with a liquid that will always be at a temperature lower than the point of danger of gasification of such parts of oils as will be likely to leave material behind to clog the pipe.

Another object of the invention is to provide means to take the steam generated in the waterjacket, superheat the same, and introduce the superheated steam into the oil vapor for the purpose of modifying the combustion of the same. 7

A still further object of the invention is to provide a construction where the parts can be readily cleaned when clogged.

The invention is illustrated in the accompanying drawing, in which Figure 1, is a sectional view, partly dlagrammatic, of an oil stove constructed 1n accordance with my invention;

Fig. 2, is a sectional View, on the line 22 of Fig. 1; and,

Fig. 3, is a sectional view of one of the parts.

In the drawing, like numerals of reference refer to the same parts in each of the views;

In the drawing I have shown my inven tlon as applied to an oil stove which may have any number of burners; but it may be stated that the same principle will apply where oil is being used as a fuel in a cooking stove, or a furnace.

As shown, I illustrate a device for burning oil of old construction in which a generating cup 4, inner and outer perforated cylinders 5, and 6, and wick 7 are used for the purpose of converting the oil into a gas, and the introduction of the proper amount of air to produce a blue flame. A casing 8 may also be used to inclose the perforated cylinders, and the inner cylinder may carry the dome 9, and diaphragm 10 to properly force the air into the ascending vapor. This construction is shown simply because it has been tried, and proven practical. It forms no part of my invention.

The essential feature of my invention is the introduction of the oil fuel without liability of serious gasification in the feed pipe.

As shown the oil may be fed by any airlevel contrivance, as 11; and the oil may be held in a container 12, of any desired construction, and of any desired material. The oil, as will be understood, is fed through the pipe 13, regulated by a valve 1 1, of any desired construction; and the cup, or generating device 4 is so located that the oil level 15 will not rise above the top of the cup so that there is never any possibility of the oil overflowing the top of the cup 1 should the valve be left open when the stove is cold.

The pipe 13 communicates with the gencrating cup 4 through a pipe 16, while an extension 17 may carry oil from the device 11 to another stove, or to any number of stoves, or burners, as will be understood.

Within the heat zone of the burning vapor, which may be designated the combustion chamber, as 18, I provide a water jacket for the oil feed tube. As shown, I provide a large pipe 19, into which the pipe 13 enters through a stuffing box 20, while the pipe 16 passes through anot er stuliing box 21. I also provide a water feeding device 22, to which water may be fed by a bottle 23, or in any desired manner, to maintain a water shown more particularly in Fig. 3.

level 24:, in the device 22. The maintaining of this water level by the means illustrated forms no part oi my invention, as will be understood, as there are many ways of maintaining a water level. 7

The device 22 is connected with the pipe 19 through a small pipe 25. I also provide a riser 26, which is connected with the pipe 19, through the orifice 27 in the fittin 28- n explanation it may be stated that the fitting 28 is of special construction so the water pipe 19 can enter the orifice 29, leaving the orifice 30 for the necessary fittings to form the stuihng box 21 through which the oil pipe 16 passes.

No representation of water in the pipes 19, and 25, is made for the reason that it is desired to show clearly the construction and arrangement of the various pipes and fittings; but it will be understood that as the device 22- is filled with water, which is free i to flow down the pipe 25, the pipe 25 will be filled with water as well as the large pipe 19, the fittings to the stuiiing box 21, and the riser 26, to the level 21 of the water in the device 22.

a It will be observed the pipe 16 does not extend to the generating cup 4, but is mounted in a collar 31, into the top of which is screwed the stem 320i the cross tube 33, in the ends ofwhich are mounted the plugs 3 while the generating cup 4 is in communication with this'tube through orifices 35.

In operation oil enters the generating cup 4 through the pipe 13; and may be regw lated by the valve 14, as will be understood. As the pipe 13 is water jacketed after entering the heat zone, it is evident that the ten perature of the iniiowing oil can not rise above the temperature of the water sur rounding the same until after the oil has passed through the stufling box 21; and if there is any debris left after the vaporiza-' 7 tion of the 011 either in the stem 32, or cross tube 33, the cross tube can be readily de- 7 tached from the collar 31 by unscrewing;

and the plugs 34 can be removed so that the cross tube and connecting parts can be easily and readily cleaned, as will be understood.

The space 36 is provided in the top of the riser '26 so steam may be formed by the boiling water; and means will be hereinafter described for the ready escape of this steam. Consequently the temperature of the water in the pipe 19, and riser 26 can not possibly greatly exceed the temperature of boiling wa ter; and as water boils at a temperature of 212 Fahr. while kerosene is vaporized at a higher temperature, and fuel oil at a higher temperature still, the inflowing oil will be kept below a temperature of vaporization by the water jacket, as will be clear; and there is no possibility of the "heat from the combustion chamber traveling along the oil feed tube by convection to a point where debris left by vaporization can not be easily reached and cleaned out.

It has been ascertained by actual practice that the introduction of superheated steam into oil vapor will render the combustion of the vapor more efiicient to the point where less oil will be required to maintain the desired heat. This may be ascribed in part to the'tact that the steam when superheated will be in excellent condition for decomposition and burning. Further, the introduction of the steam thins the oil vapor,

and seems to make it more suitable for combustion. It is possible there are other reasons; but observation shows a difie'rence in combustion and a saving of oil.

As heat from the burning vapor will be radiated to the water jacket, and in time will causethe water toboil, I have provided means to draw oil the steam formed by the boiling water, to superheat this steam, and to introduce the heated steam into the combustion chamber, preferably as soon after the vaporization of the oil as possible.

As shown, I provide a. superheating device comprising a coil 37, which is connected with the riser 26 by a part 38; and this coil is composed of an inner coil through which the steam from the riser 26 can rise to the top of the coil, from which point it descends in the outer coil to be discharged through the orifices 39 in the outer side of the lower turn of the coil. This coil is located, as shown, interiorly of the combustion chamber 18 so that the heat used in superheating the steam is substantially waste heat.

By this arrangement, the steam generated from the water surrounding the inflowing oil pipe is superheated, and rendered suitable t'or introduction into the generated oil vapor. And as the steam is desirable in connection with the oil vapor, as much of the steam is produced as possible without using heat that would be otherwise useful. With this object in view l'prei'er to provide thev riser 26, which extends within the heat zone of the burning vapor so as to make the water in the top of the riser as hot .as possible for the generation of the maximum amount of steam from the waste heat;

It will be understood that the combustion chamber, 1 and, consequently, the riser and superheater may be made in various sizes, especially the superheater. Consequently, as it is desirable that the riser should extend well within the combustion chamber so as to generate as much steam as possible, I may flatten the upper end, or provide it with a shoulder so as to pass within the superheater. In Fig. 2 of the drawing this applied to a burner in a stove there would necessarily be a change in the construction of the feed, and arrangement of the feeding device. What I claim as the essential part of my invention is the j acketing of the intake oil tube to the limit where vaporiza- 7 tion would. be liable to take place; and the providing means to convert the used water into steam, superheat the same, and introduce the superheated steam into the combustion chamber for the purpose of modifying the combustion. Various changes would be made in construction to adapt the device to different uses, as will be understood.

1 claim:

1. In an oil stove having a generating device, an oil duct leading to said generating device, and a Water jacket forming a boiler surrounding a part of said duct, for the purpose set forth;

2. In an oil stove having a generating device and means to burn the vapor generated in said device adjacent thereto whereby the heat of the burning vapor is applied in part to said generating device, an oil duct leading to said generating device, and a water jacket forming a boiler inclosing a part of said duct whereby the vaporization of the entering oil is prevented prior to reaching said generating device, and means to utilize the steam generated in said boiler in combination with the oil vapor.

8. In an oil stove having a generating device and means to burn the vapor generated in said device adjacent thereto whereby the heat of the burning vapor is applied in part to the generating device, an oil duct leading to said generating device, and a water jacket forming a boiler inclosing a part of said duct within the heat zone of the burning vapor, means to superheat the steam generated in said boiler, and means to utilize the superheated steam in combination with the oil vapor.

4. An oil stove having a generating device, and a water-j acketed feed tube adjacent thereto forming a boiler, a combustion chamber, and means to feed the steam from said boiler into the combustion chamber.

5. An oil stove having a generating device and a water-jacketed feed tube adjacent thereto forming a boiler, means to superheat the steam from said jacket, a combustion chamber, and means to feed the superheated steam into the combustion chamber.

6. An oil stove comprising a gas generating device, a water-j acketed oil duct leading to said generating device, a combustion chamber, a steam superheating device lying within the heat zone of said combustion chamber and connected with said water jacket, and means to deliver the superheated steam from said superheating device to the combustion chamber.

7. An oil stove comprising a gas generating device, a water-jacketed oil feed tube leading to said generating device, a combustion chamber, a riser connected with said water jacket and extending within the heat zone of said combustion chamber, a superheating device connected with said riser and lying within the heat zone of said combustion chamber, and means to deliver superheated steam from said superheating device to said combustion chamber.

, Dated 29th January, 1920.

GARRY P. VAN WYE. 

